Air cleaner



May 27, 1930. E. R. EVANS 7 1 1760,351 f 1 AIR CLEANER Filed Deg. 27, 1926 2 sheds-sheet 2 25 tion engine 35 suction conduit 7 which Patented May 27, 193!) EDWIN EVANS, 015 DETROIT, MICHIGAN.

AIR CLEANER Application filed December 27, 1926. Serial No. 157,389;

The invention relates to air purifiers and is designed particularly for use with internal combustion engines to supply air to the carburetors thereof. One of the objects of the invention is to provide an improved construction of air purifier which will supply air with a greater percentage of the dust, dirt, or other foreign matter, removed. Other objects of the invention reside in thenovel features of construction and combinations and arrangements of parts as more fully hereinafter set forth.

In the drawings I V Figure 1 is a side elevation of an internal 5 combustion engine having applied thereto an air purifier embodying my invention;

Figure 2 is an enlarged longitudinal section through the air purifier;

Figure 3 is a view similar and at right 20 angles to Figure 2;

Figure 4; is a cross section on the line H of Figure 3. y

In the present instance I have shown my air purifier as applied to an internal combus- 1 with the carburetor 2 having an air intake conduit 3. 4 is a fan associated with the engine and adapted to be driven thereby and cooperate with the radiator (not shown) in maintaining a cooling system for the engine.

The air purifier, as shown particularly in Figures 2, 3, and l, comprises the cylindrical casing 5, deflector. 6 concentrically located within and spaced from the casing and the extends concentrically within and is spaced from the casing. This suction conduit is connected to the air intake conduit 8 of the carburetor and has the frontend thereof preferably extending with- 40 in and spaced from the deflector 6. The casing 5 is positioned in rear of the fan 4 so that the fan will force air through the casing. The deflector 6 is impcrforate and is flared in the direction of the air current from the fan and this deflector preferably has the rear end thereof provided with an annular flange 8 having a greater flare and terminating at a point substantially midway between the dethe deflector I preferably provide radially extending arms .9 at the rear end of the deflector extending between the front'and rear sections of the casing 5, which are connected by the V-shaped ring 10. I also provide radially extending arms 11 which extend between the sections of the casing and are securedto the suction conduit 7 near the front I end thereof. I further provide radially extending arms 12 at the rear end of the casing 5 and secured to the suction conduit to cooperatewith the arms 11 in rigidly connecting the casing with the suction conduit. These arms are all preferably made convex in cross section and face toward the fan.

v As thus far described it will be seen that during the operation of the engine the fan a forces air through the casing 5 and past the deflector 6 which with the casing forms a Venturi passageway. This air is forced through the restricted )ortion of the Venturi passageway at high ve ocity and then is allowed. to expand. The greater part ofthe dust, dirt and other foreign matter in the air continues its passage through the casin whilethe air which is comparatively free 0 this dust, dirt and other foreign matter is drawn into the deflector 6 and then into the suction conduit 7 To further purify the air, I have provided the vane member 13 which ma be in the nature of a die casting and is a apted to be assembled Within the deflector 6. This vane member has the spirally arranged vanes 14 which extend adjacent to the wall of the de-. flector from the rear end to near the front end thereof, the vanes operating during the flow of the air within the deflector to create a swirling action of the air, thereby throwing dust, dirt and other foreign matter which might enter the deflector centrifugally to-- ward the wall thereof, The vane member also has the channel or U-shaped portion 15 which cooperates with the wall of the do flector 6 to form an air passageway and terminates withinthe deflector at its front end and preferably beyond the front ends of the vanes 14. shaped portion extends rearwardly beyond The rear end of this channel- 50 flector 6 and the casing 5. For supporting the deflector 6 and terminates at a point such 10 r cation with said casing,

that the air being forcedtl irough the passage- Way within the casing 5 creates an e ectOr eflect to draw the dust,dirt or other foreign matter with someair from the interior of the deflector 6 at its front end. This channelshaped portion 15 preferably inclined to the axis of the deflector so that the suction created therewithin will not be so great as to disturb the operativeness of the remainder of the air cleaner. Also the opening in the front end portion of the channel-shaped por-v tion 15 is preferably at the side facing the current of swirling air and dust, dirt or other foreign matter to thereby assist in removing the latter.

For facilitatingthe entrance of the pure air into the suction conduit 7, I have provided a second deflector 16 which is preferably integral with the vane member 13 and has the flared front end portions 17, the rear end portion of this deflect-or extending within and extending diametrically of the suction conduit.

IVith the above construction it will be seen that the air entering the'deflector 6 and passing toward the front end thereof has a swirl- 4 ing action so that the dust, dirt and other foreign matter is removed from within the front end of the deflector and thatthe pure a r is directed into the suction conduit and then passes through the air intake conduit to'the' carburetor.

What I claim as my invention is:

1. In an air purifier, the combination with a casing, of a suction air conduit in communia deflectorin said and overlapping the end of said conduit, said casing with said deflector forming a passageway adapted for tls passage of a propelled current of air, men is within said deflector for causing the air therewithin to swirl and means for withdrawing the air from within said deflector and adjacent to the same.

2. In an air purifier, the combination with a casing, of a suction air conduit in communi cation with said casing, a deflector in said casing and overlapping the end ogt said conduit, said a passageway adapted for the passage of a propelied'current of air, spirally arranged vanes within said deflector'for creating a swirling action of the air, and means dependent upon the passage of air through said passageway for withdrawing air from within said deflector at its front end.

3. In an air purifier, the combination with a casing, of a suction air conduit in coinmunication with said casing, a deflector in said casing and overlapping the end of said conduit, said casin with said deflector forining' a passageway adapted for the passage of a propelled current of air, and means extend ing within deflector and cooperating form a, conduit in communicatherewith to cation with said casing,

tending within said with spirally arranged vanes for creating a,

i, J: Y casing with sa d deflector iorming tion with the space inclosed by said deflector at its front and in communication with said passageway in rear of said deflector.

4. I11 an air purifier, the combination with a casing, of a suction air conduit in communia deflector in said casing and overlapping the end of said conduit, said casing with said deflector forming a passageway adapted for the passage of a propelled current of air, spirally arranged vanes within said deflector for creating a swirling action of. the air, ing with said deflector a conduit opening into the space within said deflector at its front end and opening into said passageway in rear of said deflector.

5. In an air purifier, the combination with a casing. of a suction air conduit in communication with said casing, a deflector in said casing and overlapping the end of said air conduit, said casing with said deflector forming a passageway adapted for the passage of a propelled current of air and a member eX- deflector and provided swirling action of the air and with a channel shaped member for cooperating with said deflector to form a passageway opening into the space inclos' d within said deflector at its frontend and opening into said passageway in rear of said deflector.

' 6. In an air purifier, the combination with a casing, of a suction air conduit in communication with said casing, a deflector in said casing and overlapping the end of said air conduit, said casing with said deflector forming a passageway adapted tor the passage of a propelled current of air, means within said deflector for creating a swirling action of ,the air, means cooperating with said deflector for forming a passageway communicating with the its front end and communicating with said iiistmientioned l'iassagewayin rear of said deflector, and a second deflector within said first-mentioned deflector and spaced from the front end thereof for directing the air into said conduit.

7. In an air purifier, the combination with a suction conduit, of an imperforate deflector surrounding and closely related to the mouth of said conduit, means for forcing air;

past said deflector, said deflector being'flared 1n the direction of the air current, means ,within said deflector for causing the air tlierewithin to swirl, and means for withdrawing air from within said deflector.

8. In an air purifier, the combination with a suction conduit, of an iinperforate deflector surrounding and ciosely related to the mouth of said conduit, means for forcing air past said deflector, said deflector being flared in the direction of the air current, spirally arranged vanes within said deflector for creating a swirling action of the air, and means space inclosed by said deflector at dependent upon the flow of air past said deflector for withdrawing air from within said deflector.

9. In an air purifier, the combination with a suction conduit, of an imperforate deflector surrounding and closelyrelated to the mouth of said conduit, means for forcing air past said in the direction of the air current, means within said deflector for causing the air therewithin to swirl, and means forconducting air from within said deflector, said conducting means having anentrance opening within said deflector facing the swirling current of air.

10. In an air purifier for a carburetor, the combination with asuction conduit connected to the carburetor, of a deflector for guarding the mouth of said conduit, means for forcing air past said deflector, some of the air passing said deflector being drawn within said deflector and into said conduit, and means for withdrawing foreign matter from within said deflector.

11. In an air purifier, the combination with a suction conduit adapted for the passage of air, of a deflector for guarding the mouth of said conduit, means for inducing a current of air against said deflector and in a direction substantially parallel to the longitudinal axis of said conduit, and means dependent upon the flow of air past said deflector for withdrawing foreign matter from within said deflector.

12. In an air purifier, the combination with a suction conduit, of an imperforate deflector surrounding and closely related to the mouth of said conduit, means for forcing air past said deflector, said deflector being flared in the direction of the air current and means dependent upon the Ilow of air past said deflector for withdrawing foreignmatter from within the forward portion of said deflector.

13.111 an air pu rifler,the combination with a casing having open ends, of a curved deflector within said casing and formlng therewith a Ventun passageway, means'for causing a current of air to pass through said Ven-v turi passageway, means extending Within said deflector for withdrawing. a portion of the air after it has expanded, and meansdependent upon the flow of air through said Venturi passageway for withdrawing foreign matter from within the forward portion of said deflector.

14. In an air purifier, the combination with a suction conduit, of an imperforate deflector surrounding and closely related to the mouth of said conduit, means for forcing air past said deflector, said deflector being flared in the direction of the air current, means within said deflector for creating a swirling action ofthe air, and means dependent upon the flow of air past said deflector for withdeflector, said deflector being flared.

ward portion of In testimony w said deflector. hereof I affix my signature.

EDWIN EVANS. 

